Public Information Statement
Issued by NWS Newport/Morehead, NC

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8

000
NOUS42 KMHX 181028
PNSMHX
NCZ029-044>047-079>081-090>095-098-103-104-181430-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE NEWPORT/MOREHEAD CITY NC
628 AM EDT TUE MAR 18 2014

THE NATIONAL WEATHER SERVICE HAS DECLARED MARCH 16 THROUGH
MARCH 22 AS FLOOD SAFETY AWARENESS WEEK. THE NATIONAL WEATHER
SERVICE IN NEWPORT/MOREHEAD CITY WILL FEATURE INFORMATION ABOUT A
DIFFERENT FLOOD TOPIC EACH DAY DURING THE AWARENESS WEEK.

TODAY`S TOPIC: FLOODS HAZARDS.

A FLOOD IS DEFINED AS ANY HIGH FLOW...OVERFLOW...OR INUNDATION OF
WATER THAT CAUSES OR THREATENS DAMAGE. FLOODING CAN OCCUR WITH
PROLONGED RAINFALL OVER SEVERAL DAYS...INTENSE RAINFALL OVER A
SHORT PERIOD OF TIME...OR WHEN WATER FROM AN EXISTING SOURCE MOVES
TOO QUICKLY (I.E. SNOWMELT...DAM BREAK...ETC.). BRIEF DESCRIPTIONS
OF THE VARIOUS TYPES OF FLOODING YOU MAY EXPERIENCE ARE FOUND
BELOW. MORE INFORMATION ABOUT THESE FLOOD HAZARDS CAN BE FOUND ON
THE NWS FLOOD SAFETY WEBSITE AT WWW.FLOODSAFETY.NOAA.GOV

FLASH FLOODING: FLASH FLOODING IS A RAPID AND EXTREME FLOW OF HIGH
WATER INTO A NORMALLY DRY AREA...OR A RAPID WATER LEVEL RISE IN A
STREAM OR CREEK ABOVE A PREDETERMINED FLOOD LEVEL...BEGINNING
WITHIN SIX HOURS OF THE CAUSATIVE EVENT (I.E. INTENSE
RAINFALL...DAM FAILURE...ICE JAM).

RIVER FLOODING: RIVER FLOODING OCCURS WHEN RIVERS RISE AND
OVERFLOW THEIR BANKS...INUNDATING AREAS THAT ARE NORMALLY DRY.

TROPICAL SYSTEMS AND COASTAL FLOODING: AT ANY TIME OF YEAR...A
STORM FROM OVER THE OCEAN CAN BRING HEAVY PRECIPITATION TO THE
U.S. COASTS. WHETHER SUCH A STORM IS TROPICAL OR NOT...PROLONGED
PERIODS OF HEAVY PRECIPITATION CAN CAUSE FRESHWATER FLOODING IN
COASTAL AREAS...AS WELL AS FURTHER INLAND AS THE STORM MOVES ON
SHORE. IN ADDITION TO THE FRESHWATER FLOOD THREAT...TROPICAL
SYSTEMS AND NOR`EASTERS CAN BRING THE THREAT OF STORM SURGE
RELATED COASTAL FLOODING.

BURN SCARS/DEBRIS FLOWS: WILDFIRES BURN AWAY THE VEGETATION OF AN
AREA...LEAVING BEHIND BARE GROUND THAT TENDS TO REPEL WATER. WHEN
RAIN FALLS...IT RUNS OFF A BURN SCAR TOWARDS A LOW LYING
AREA...SOMETIMES CARRYING BRANCHES...SOIL AND OTHER DEBRIS ALONG
WITH IT. WITHOUT VEGETATION TO HOLD THE SOIL IN PLACE...FLOODING
CAN PRODUCE MUD AND DEBRIS FLOWS.

SNOWMELT: FLOODING DUE TO SNOWMELT MOST OFTEN OCCURS IN THE SPRING
WHEN WARMING TEMPERATURES QUICKLY MELT THE SNOW. THE WATER RUNS
OFF THE STILL PARTIALLY FROZEN OR ALREADY SATURATED GROUND INTO
NEARBY STREAMS AND RIVERS...CAUSING THEM TO RAPIDLY RISE AND
SOMETIMES OVERFLOW THEIR BANKS.

ICE AND DEBRIS JAMS: A BACKUP OF WATER INTO SURROUNDING AREAS CAN
OCCUR WHEN A RIVER OR STREAM IS BLOCKED BY A BUILD-UP OF ICE OR
OTHER DEBRIS.

DRY WASH: WHEN HEAVY RAIN FALLS OVER DRY LAND...THE WATER RUSHES
TOWARDS LOW-LYING AREAS...WHICH MAY INCLUDE DRIED UP CANYON OR
STREAM BEDS. THIS CAN QUICKLY TURN A DRY CHANNEL INTO A RAGING
RIVER.

DAM BREAK AND LEVEE FAILURE: A BREAK OR FAILURE CAN OCCUR WITH
LITTLE TO NO WARNING. MOST OFTEN THEY ARE CAUSED BY WATER
OVERTOPPING THE STRUCTURE...EXCESSIVE SEEPAGE THROUGH THE
SURROUNDING GROUND...OR A STRUCTURAL FAILURE.

UNDERSTANDING THE DIFFERENT FLOOD HAZARDS AND KNOWING THE ACTIONS
TO TAKE BEFORE...DURING...AND AFTERWARDS CAN HELP YOU PROTECT YOUR
LIFE...THE LIVES OF YOUR LOVED ONES...AND YOUR PROPERTY. PREPARE
NOW BY VISITING WWW.FLOODSAFETY.NOAA.GOV.

JOIN US TOMORROW FOR INFORMATION ON FLOOD RELATED SERVICES PROVIDED
BY THE NATIONAL WEATHER SERVICE.

$$




USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.